Method for transmitting video surveillance images

A method for transmitting by a surveillance device to a control room, via a telecommunications network, a series of images, said method comprising the steps, implemented by the surveillance device, of:

• acquiring the series of images;
• coding the series of images acquired into a series of base video frames comprising a first quantity of information and into at least one series of enhancement video frames of the series of base video frames, said at least one series of enhancement video frames comprising a second quantity of information making it possible to enhance the quality of the series of images coded into the series of base video frames;
• transmitting in real time via the telecommunications network at least the series of base video frames to the control room;
• and
• storing said at least one series of enhancement video frames;
• receiving a request, sent by the control room, for obtaining a subset of frames among said at least one series of enhancement video frames, the request comprising a frame start index and a frame end index;
• extracting the requested subset of frames, the frames of the subset being temporally included between the frame start index and the frame end index;
• and
• transmitting to the control room, via the telecommunications network, the extracted subset of frames.